All existing supplies of helium ought to be conserved and released only by permit, with medical uses receiving precedence over other commercial or recreational demands. 现有的所有氦供给应该被保存下来,并且只有在获得许可的情况下才能释放,医疗用途优先于其他商业或娱乐需求。
Before the rules of diplomatic precedence were worked out in the early sixteenth century, rival ambassadors often fought for the most honourable seating position at a ceremony. 在16世纪早期外交优先规则制定之前,敌对的大使经常在仪式上争夺最尊贵的座位。
Firstly, all existing supplies of helium ought to be conserved and released only by permit, with medical uses receiving precedence over other commercial or recreational demands. 首先,所有现有的氦供应应该被保存下来,并且只有在获得许可的情况下才能释放,医疗用途应优先于其他商业或娱乐需求。